EP2075445B1 - Système d'alimentation d'air secondaire et véhicule - Google Patents

Système d'alimentation d'air secondaire et véhicule Download PDF

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Publication number
EP2075445B1
EP2075445B1 EP08020761A EP08020761A EP2075445B1 EP 2075445 B1 EP2075445 B1 EP 2075445B1 EP 08020761 A EP08020761 A EP 08020761A EP 08020761 A EP08020761 A EP 08020761A EP 2075445 B1 EP2075445 B1 EP 2075445B1
Authority
EP
European Patent Office
Prior art keywords
air
engine
fuel ratio
secondary air
state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08020761A
Other languages
German (de)
English (en)
Other versions
EP2075445A1 (fr
Inventor
Yuuji Araki
Ryusuke Kato
Masaki Torigoshi
Hiroki Tanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
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Yamaha Motor Co Ltd
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Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of EP2075445A1 publication Critical patent/EP2075445A1/fr
Application granted granted Critical
Publication of EP2075445B1 publication Critical patent/EP2075445B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • F02D35/0023—Controlling air supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the amount of the secondary air to be supplied to the exhaust passage is appropriately adjusted by the adjuster based on the state of the engine.
  • the purification of the exhaust gas by the secondary air and the purification of the exhaust gas by the catalyst device can be appropriately combined.
  • the efficiency of purifying the exhaust gas can be effectively improved.
  • a seat 15 is provided above the engine 7.
  • An ECU (Electronic Control Unit) 16 that controls operations of each component of the motorcycle 100 is provided below the seat 15. Details of the ECU 16 will be described below.
  • Each of the intake ports 9 on the cylinder 74 side branches into two passages.
  • each of the exhaust ports 12 on the cylinder 74 side branches into two passages.
  • each of the intake ports 9 has two open ends 9a
  • each of the exhaust ports 12 has two open ends 12a.
  • Two intake valves 77 and two exhaust valves 78 of Fig. 2 are provided for each cylinder 74.
  • the accelerator opening sensor 30 ( Fig. 2 ) is positioned in the vicinity of the throttle valve 81 of the throttle body 10, and detects an operation amount (hereinafter referred to as an accelerator opening) of an accelerator grip (not shown) by a driver.
  • the oxygen sensor 31 is provided in the exhaust pipe 13, and detects the oxygen concentration in the exhaust pipe 13. As shown in Fig. 3 , the oxygen sensor 31 is provided between the passages 131 to 134 and the catalyst device 13a.
  • Figs. 6 to 8 are diagrams showing test results based on an NEDC (New European Driving Cycle) mode.
  • Fig. 6 shows a result of detection of NOx in the exhaust gas
  • Fig. 7 shows a result of detection of HC in the exhaust gas
  • Fig. 8 shows a result of detection of CO in the exhaust gas.
  • the ordinate indicates the throttle opening and the abscissa indicates the engine speed.
  • the results of detection of NOx, HC and CO are indicated by "O”.
  • the sizes of "O" shown in Figs. 6 to 8 are proportional to the amount of detection of each component. For example, the amount of detection of NOx is large under a condition where the diameter of "O" is large in Fig. 6 .
  • Figs. 11 to 13 are diagrams showing examples of a proportional gain (a coefficient of a P term), an integral gain (a coefficient of an I term) and a differential gain (a coefficient of a D term), respectively, used in the PID control of the air amount adjusting valve 34.
  • both the cross sectional area of the flow rate adjuster 41 and the cross sectional area of the passage 201 are gradually increased downward.
  • the flow rate adjuster 41 moves up and down in the passage 201, thereby causing the cross sectional area of a gap between an outer peripheral surface of the flow rate adjuster 41 and an inner peripheral surface of the passage 201 to vary.
  • the amount of the secondary air flowing through the passage 201 is adjusted.
  • the amount of the secondary air supplied from the air cleaner box 8 ( Fig. 3 ) to the exhaust ports 12 ( Fig. 3 ) is adjusted.
  • the arithmetic processing unit 300 includes an air-fuel ratio arithmetic circuit 301, a PID controller 302, a valve controller 303 and arithmetic elements 311, 312.
  • the arithmetic processing unit 300 is provided in the ECU 16 ( Fig. 2 ), for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (10)

  1. Système d'alimentation d'air secondaire qui alimente de l'air secondaire vers un passage d'échappement d'un moteur, comprenant:
    une source d'alimentation de l'air secondaire;
    un passage d'alimentation à travers lequel l'air secondaire est alimenté de la source d'alimentation vers le passage d'échappement;
    un déterminateur qui détermine un état du moteur;
    une mémoire qui mémorise un rapport air-carburant cible réglé d'avance en fonction de l'état du moteur; et
    un ajusteur qui ajuste, sur base de l'état du moteur déterminé par le déterminateur et du rapport air-carburant cible mémorisé dans la mémoire, une quantité d'air secondaire à alimenter du passage d'alimentation vers le passage d'échappement, de sorte qu'un rapport air-carburant dans le passage d'échappement soit le rapport air-carburant cible, dans lequel
    l'état du moteur comporte un premier et un deuxième état réglés d'avance sur base de la quantité d'oxyde d'azote échappé d'une chambre de combustion du moteur, et un troisième état réglé d'avance sur base d'une charge appliquée sur le moteur,
    la quantité d'oxyde d'azote dans le premier état est inférieure à la quantité d'oxyde d'azote dans le deuxième état, et la charge appliquée dans le troisième état est supérieure aux charges appliquées dans le premier et le deuxième état, et
    le rapport air-carburant cible comporte un premier rapport air-carburant correspondant au premier état, un deuxième rapport air-carburant correspondant au deuxième état, et un troisième rapport air-carburant correspondant au troisième état, le premier rapport air-carburant est réglé d'un côté plus pauvre que le deuxième rapport air-carburant, et le troisième rapport air-carburant est réglé d'un côté plus riche que le deuxième rapport air-carburant.
  2. Système d'alimentation d'air secondaire selon la revendication 1, comprenant par ailleurs un clapet d'étranglement qui ajuste une quantité d'entrée du moteur, dans lequel
    le déterminateur détermine l'état du moteur sur base d'une vitesse de rotation du moteur et d'une ouverture du clapet d'étranglement.
  3. Système d'alimentation d'air secondaire selon la revendication 1, dans lequel
    le déterminateur détermine l'état du moteur sur base de la vitesse de rotation du moteur et d'une pression dans un orifice d'entrée du moteur.
  4. Système d'alimentation d'air secondaire selon la revendication 1, comprenant par ailleurs un premier détecteur qui détecte la quantité d'oxyde d'azote échappé de la chambre de combustion du moteur, dans lequel
    le déterminateur détermine l'état du moteur sur base de la quantité d'oxyde d'azote détectée par le premier détecteur.
  5. Système d'alimentation d'air secondaire selon la revendication 1, dans lequel
    l'ajusteur interrompt l'alimentation d'air secondaire du passage d'alimentation vers le passage d'échappement lorsque l'état du moteur est déterminé comme étant le troisième état par le déterminateur.
  6. Système d'alimentation d'air secondaire selon la revendication 1, comprenant par ailleurs un deuxième détecteur qui détecte la concentration d'oxygène dans le passage d'échappement, dans lequel
    l'ajusteur corrige une quantité d'alimentation d'air secondaire du passage d'alimentation vers le passage d'échappement sur base de la concentration d'oxygène détectée par le deuxième détecteur.
  7. Système d'alimentation d'air secondaire selon la revendication 1, dans lequel le premier rapport air-carburant est réglé à pas moins de 15.
  8. Système d'alimentation d'air secondaire selon la revendication 1, dans lequel le deuxième rapport air-carburant est réglé à un rapport air-carburant sensiblement théorique.
  9. Système d'alimentation d'air secondaire selon la revendication 1, dans lequel le passage d'alimentation est connecté au passage d'échappement à une position à moins de 50 mm de la chambre de combustion du moteur.
  10. Véhicule, comprenant:
    un moteur;
    une roue d'entraînement;
    un mécanisme de transmission qui transmet à la roue d'entraînement la puissance générée par le moteur;
    un passage d'échappement à travers lequel circule un gaz d'échappement échappé du moteur;
    un dispositif catalyseur qui est prévu dans le passage d'échappement et purifie le gaz d'échappement échappé du moteur; et
    un système d'alimentation d'air secondaire selon l'une quelconque des revendications 1 à 9 qui alimente de l'air secondaire vers le passage d'échappement.
EP08020761A 2007-12-27 2008-11-28 Système d'alimentation d'air secondaire et véhicule Not-in-force EP2075445B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007337492A JP2009156222A (ja) 2007-12-27 2007-12-27 ２次空気供給システムおよび車両

Publications (2)

Publication Number Publication Date
EP2075445A1 EP2075445A1 (fr) 2009-07-01
EP2075445B1 true EP2075445B1 (fr) 2010-11-17

Family

ID=40419149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020761A Not-in-force EP2075445B1 (fr) 2007-12-27 2008-11-28 Système d'alimentation d'air secondaire et véhicule

Country Status (5)

Country Link
US (1) US7987664B2 (fr)
EP (1) EP2075445B1 (fr)
JP (1) JP2009156222A (fr)
AT (1) ATE488684T1 (fr)
DE (1) DE602008003513D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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DE102012009355B4 (de) * 2011-12-09 2022-01-05 Audi Ag Abgasreinigungseinrichtung sowie Brennkraftmaschinenanordnung
US9109494B2 (en) * 2012-02-07 2015-08-18 Ford Global Technologies, Llc Air injection timed with exhaust release
US10578038B2 (en) * 2014-06-23 2020-03-03 Ford Global Technologies, Llc Method and system for secondary air injection coordination with exhaust back pressure valve
WO2018063973A1 (fr) * 2016-09-27 2018-04-05 Cummins Inc. Système et procédés de commande de combustion dans des moteurs à pistons opposés multi-cylindres
CN214533261U (zh) * 2020-11-16 2021-10-29 浙江春风动力股份有限公司 一种减少尾气污染物含量的摩托车

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Also Published As

Publication number Publication date
JP2009156222A (ja) 2009-07-16
US20090165765A1 (en) 2009-07-02
US7987664B2 (en) 2011-08-02
EP2075445A1 (fr) 2009-07-01
DE602008003513D1 (de) 2010-12-30
ATE488684T1 (de) 2010-12-15

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